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OF
FRQ1
UF
OF
FRQ2
UF
OF
FRQ3
UF
OF
FRQ4
UF
OF
FRQ5
UF
OF
FRQ6
UF
331, 2023
FVBLK
1
"OF"
[FRQ1EN]
"UF"
+
"OF"
[FRQ2EN]
"UF"
+
"OF"
[FRQ3EN]
"UF"
+
"OF"
[FRQ4EN]
"UF"
+
"OF"
[FRQ5EN]
"UF"
+
"OF"
[FRQ6EN]
"UF"
+
1
1600
FRQ1 BLOCK
1
1601
FRQ2 BLOCK
1
1602
FRQ3 BLOCK
1
1603
FRQ4 BLOCK
1604
FRQ5 BLOCK
1
1
1605
FRQ6 BLOCK
≥1
&
1
&
≥1
&
1
&
≥1
&
1
&
≥1
&
1
&
≥1
&
1
&
≥1
&
1
&
≥1
≥1
≥1
≥1
≥1
≥1
Figure 2.3.3
Scheme Logic of Frequency Protection
⎯
89
681
324, 2016
&
682
325, 2017
&
683
326, 2018
&
684
327, 2019
&
685
328, 2020
&
686
329, 2021
&
⎯
6 F 2 S 0 8 4 2
TFRQ1
479
t
0
FRQ1 TRIP
&
0.00 - 100.00s
TFRQ2
480
0
t
FRQ2 TRIP
&
0.00 - 100.00s
TFRQ3
481
0
t
FRQ3 TRIP
&
0.00 - 100.00s
TFRQ4
482
t
0
FRQ4 TRIP
&
0.00 - 100.00s
TFRQ5
483
0
t
FRQ5 TRIP
&
0.00 - 100.00s
TFRQ6
484
0
t
FRQ6 TRIP
&
0.00 - 100.00s
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